Heating-coil disk.



M. MURPHY.

HEATING COIL DISK.

APPLICATION FILED APR. 15. 1916.

1234, 1 96. 1 atented July 24, 1917.

2 SHEETSSHEET I. "1

I jwue-n for M. MURPHY.

HEAHNG COIL DISK.

APPLICAHQN HLED APR. [5, 1916.

1,234, 1 96. Patented July 24, 1917.

2 SHEETS-SHEET 2.

a 1? I gvwentoz )6 Mar/012 Amwa 4 ,1?

-MORTON MURPHY, 0F JAIDTESVZLLE, H ESCGNFBZH.

- HEATING-GQIL BISK.

Specification of Letters Fetent.

" Patented July assert.

Application filed April 15, 1916. Serial No. 91,472.

T0 cZZ whom iii-may concern:

citizen of the United States of America, residing at Janesville, in the county of Rock and State of ,Visconsin, have invented certain new and useful Improvements in Heating-Coil Disks, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to heating coils for tireless cookers and the like, and has for its object the production of a simple and efficient means for heating the interior portion or well of a tireless cooker to a predetermined temperature.

Another object of this invention is the production of a simple and etficient means for supporting the heating coil Within the bottom of the receptacle or well of the tireless cooker so as to etliciently heat the interior of the cooker.

A still further object of this invention is the production of a simple and etlicient means for supporting the heating coil Within the bottom of the receptacle or ivell of the tireless cooker so as to permit the health ing coil or element to be readily removed for cleaning or replacement without the use of tools. 7 v

Other objects and advantages of the present invention will appear throughout the following-specification and claims.

In the accompanying drawings Figure 1 1s a top plan view of the fireless cooker, the cover thereof being shown X-v I tending vertically.

Fig. 2'is a top plan view of the heating passes the heating coil 12,. the heating coildisk removed from the cooker.

Fig. 3 is a bottom plan View of the heatini disk. J v

- igz/l is a section taken on line 4 -4, of

'ig.:5 is a section taken on line 5-55, of

ig. 6 is a detail source of electrical supply by means of the perspective of one of the contact plates. l 1

the following specification.

A heating disk 5 which is preferably formed circular to conform to the shape of I V conducting Wires 4 as will be described in' Be it known that I, MORTON MURPHY, a-

the inner portion of the well is mounted Within the well '2 of the tireless cooker, and this heating disk 5 is preferably formed of porcelain or any otner suitable non-conductmg material. T he disk 5 is provided upon the under face thereof with notches?) near the periphery thereof, within which notches 6 are seated the contact plates '1, these plates 7 being formed conducting material. The plates 7 are provided with projecting lingers 8, which fingers 8 fit in the slots 9 formed in the bottom of the disk 5 and constitute an etlicient means for holding the contact'plates I against twisting movement. Bolts 10 pass through the disl-z 5 and also throughthe apertures 11 formed in the contact plates 7 so as to constitute an eiiicientineans for connecting the terminals of the heating coil 12 to the contact plates 7, and also means for holding the contact plates in engagement with the disk 5. The disk 5 is provided With a plurality of rib portions 13, which rib portions 13 are arranged so as to radiate from the central cup portion le-of the disk and constitute a reinforcement for the disk 5'and also a support for a receptacle which may he placed upon the disk. A spirally arranged rib 15 extends around the upper face of the disk 5 Within the segmental pockets 16 termed in the upper face of the disk, and the ribs 18 v are provided with notches 17 upon the loner lace thereof, through which notches 17 trical connections in connection with the present invention, it will be seen that the coil 12 is connected .to the feeding'wires 14, one of which Wires is connected to the automatic switch 19, andjthe other Wire heing connected to the contact battery 22. A wire 21 is also connected to the contact point 20, andis connected at one end of the bettery 22 or other suitalile souree of electrical supply which maybe substituted therefor. A return wire 23 13 connected to the hettecy.

or source of electrical supply 22, and is in 7 1 plates which are carried by the heating disk are held in engagement with the contact bolts by means of thumb screws, the heating disk may be readily removed from the heating well for cleaning or replacement with- W out the necessity of employing tools orcomplicated adjustments in order to replace a new disk for tlie old one or in order to clean .the same. v ,Having thus'describedthe invention what 35 is claimed as new, is:- 1. As a' new article of manufacture, a heating disk for an electrical fireless cooker comprising a body formed of non-conducting material, contactplates connected to. said so disk, said disk' provided with radiating" ribs flush with the upper face of'said disk, said disk alsofprovided with sunken pockets below the upper face of said disk, said radiating ribs constituting'a support for a receptaole adapted to be placed thereon, a heating 3o coil extending spirally aroundsaid body, said ribs formed upon said disk and provided with notches upon the under face thereof for permitting the passage of said coil under said ribs, and a spirally Wound 4o rib extendingthrough said pockets. and constituting a protector for said heatingcoil,

' 2. As a new article of manufacture, a heat-, ing disk for an electric .fireles's cooker com-' prising Y a, body formed of non-conducting 4 5 material, contact plates connected to said disk, said disk provided'with radiating arms flush with the upper face of said disk, said disk also provided with sunken pockets be lOW the upper face of the disk, said radiat ingarms constituting a support for a recep-V tacle adapted to be placed thereon, a heating coil positioned upon said body and mounted within said pockets and passing through said j radiating arms, and a spirally wound rib ex 15 tending through said. pockets and constituting a protector for said heating 'coil. In testimonyiwhereof I hereuntoafiix my signature. 1 MORTON MURPHY, 

